APC UPS battery calibration issue

[shaqblogs2011]

I have an APC UPS for which i replaced the battery few days back.
The UPS shuts down the PC within a minute of going to battery. If manually i abort the shutdown (user alert on PC), my pc continues to run at least 45 minutes! I tried to calibrate the battery, but didnt help (Let the UPS drain down to zero on a resistive load which was 35% UPS capacity. And then recharged to full).
Power chute software usually shows the estimated time, but shows nothing here now.

What is the problem? How do i fix this?

 

[shaqblogs2011]

Old was CS3 - 12V (couldnt not see the mAh, stickers on it, dosent come off.)
New is Exide - 12V, 7mAh

On battery with 100W load i get at least 45 mins and with 300W resistive load i got 17 mins.

 

[shaqblogs2011]

If its all good then why does the UPS shut down my PC withing one minute of going to battery?

 

[shaqblogs2011]

yea...but my problem was how to fix it

The "software" is on the UPS!